Xiao Zuyao, Chen Jingyuan, Duan Shifang, Lv Xianglong, Wang Jizhuang, Ma Xing, Tang Jinyao, Wang Wei
School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, Guangdong 518055, China.
Chem Commun (Camb). 2020 Apr 30;56(34):4728-4731. doi: 10.1039/d0cc00212g. Epub 2020 Mar 29.
The design of powerful, more biocompatible microrobots calls for faster catalytic reactions. Here we demonstrate a two-fold increase in the speed of photocatalytic TiO-metal Janus micromotors via a Au/Ag bi-layered coating. Electrochemical measurements show that such a bimetallic coating is a better photocatalyst than either metal alone. Similarly, an additional sputtered Ag layer could also significantly increase the speed of Pt-PS or TiO-Pt micromotors, suggesting that applying bimetallic coatings is a generalizable strategy in the design of faster catalytic micromotors.
设计功能强大、生物相容性更高的微型机器人需要更快的催化反应。在此，我们展示了通过金/银双层涂层使光催化二氧化钛-金属雅努斯微型马达的速度提高了两倍。电化学测量表明，这种双金属涂层比单独的任何一种金属都是更好的光催化剂。同样，额外溅射的银层也能显著提高铂-聚苯乙烯或二氧化钛-铂微型马达的速度，这表明应用双金属涂层是设计更快催化微型马达的一种通用策略。
